Please help me with this quickly!! I have till 11:59, show work

Answer:

-1/10, 2/10, and 4/10

Step-by-step explanation:

A rational number is a number that is in the form of p/q, where p and q are integers, and q is not equal to 0.

First, what is the lcm of 5 and 2? the lcm is 10, because that is the lowest number than can be divided separately by 5 and 2 and the results would still be a whole number.

We now need to find 3 rational numbers between -2/10 and 5/10. It's easy now that I've explained it, right?

-1/10, 2/10, and 4/10 are between -1/5 and 1/2 and are integers with the given explanation.

Hope this helps.

Answer:

49

Step-by-step explanation:

-7 + 8 x 7

order of operations says to do 8 x 7 first

-7 + 56

simple addition gets you to

49

Answer:

49

Step-by-step explanation:

-7+8x7

Use PEMDAS

first multiply 8 and 7 =56

then add -7 and +56

56-7 =49

Answer:

{x,y}={-2,4}d

Step-by-step explanation:

Solve equation [2] for the variable  y

 [2]    y = -2x

// Plug this in for variable  y  in equation [1]

  [1]    8x - 3•(-2x) = -28

  [1]    14x = -28

// Solve equation [1] for the variable  x

  [1]    14x = - 28

  [1]    x = - 2

// By now we know this much :

   x = -2

   y = -2x

// Use the  x  value to solve for  y

   y = -2(-2) = 4

Answer:

1/4×8/7=8/28

8/28×8/9=64/252

Ans:64/252=16/63

The sum of a regular polygon's exterior angles will always equal 360 degrees.

Exterior angles are those that are parallel to a polygon's inner angles but are on the outside of it. The sum of two internal opposite angles equals the measure of an exterior angle. The Exterior Angle is the angle formed by any side of a shape and a line drawn from the opposite side. Another example: When we add up the Interior Angle and Exterior Angle we get a Straight Angle (180°), so they are "Supplementary Angles". An exterior angle of the triangle is a nonstraight angle (one that is not just an extension of a side) outside the triangle but adjacent to an interior angle (Figure 1 ).

Here,

The sum of the exterior angles of a regular polygon will always equal 360 degrees.

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Answer:

2

Step-by-step explanation:

\(\begin{cases} -3x -3\:\: for\:\: x<-2\\\\6x -28\: \: for\:\: x\geq 5  \end{cases}\)

f(5) will fall in the interval x≥5 and its corresponding function is:  

    f(x) = 6x - 28

∴ f(5)= 6*5 - 28 = 30 - 28 = 2

Answer:

A

Step-by-step explanation:

First, we should put this equation in slope-intercept form by isolating y.

Thus, we have:

\(2x-\frac{4}{3}y=4\\ -\frac{4}{3}y=4-2x\\ y=\frac{3}{2}x-3\)

The slope-intercept equation shows that the y-intercept is -3 and the slope is 3/2.

Only answer A meets these requirements.

Answer:

11.3(7)+10.7(8)=79.1+85.6

=164.7

Step-by-step explanation:

\( \frac{1}{2} x + 3 = - 1 \\ \frac{x}{3} + 3 = - 1 \\ \frac{x}{3} = - 1 - 3 \\ \frac{x}{3} = - 4 \\ x = - 4 \times 3 \\ x = - 12\)

Step-by-step explanation:

\( \frac{1}{2} x + 3 = - 1 \\ \frac{x}{2} + 3 = - 1 \\ \frac{x}{2} + 3 - 3 = - 1 - 3 \\ \frac{x}{2} = - 4 \\ \frac{x}{2} \times 2 = - 4 \times 2 \\ x = - 8\)

Answer:

Slope = 0.75

Step-by-step explanation:

Slope is coefficient of x

Answer:

DVDs= $16.2

CDs = $11.9

Cassettes = $11.4

Step-by-step explanation:

Answer:

7x + 13

Step-by-step explanation:

because the correct answer is 7x+13

Answer:

-1.13

Step-by-step explanation:

you can count the lines and get the answer, one line down from -1.1 is -1.11 since -1.1 is technically -1.10 and you keep counting until the dot

Answer:

1. L1 = \(\frac{L2}{X(O2 -O1)}\)

2. O2 = \(\frac{L2 - L1(1 + XO1)}{XL1}\)

Step-by-step explanation:

Given: x = \(\frac{L2 - L1}{L1(O2 -O1)}\)

1. To make L1 the subject of formula;

x = \(\frac{L2 - L1}{L1(O2 -O1)}\)

cross multiply to have;

L2 - L1 = xL1(O2 - O1)

collect like terms,

L2 = xL1(O2 - O1) + L1

factorize the right hand side;

L2 = L1[x(O2 - O1)]

L1 = \(\frac{L2}{X(O2 -O1)}\)

2. To make O2 the subject of formula;

x = \(\frac{L2 - L1}{L1(O2 -O1)}\)

cross multiply to have;

L2 - L1 = xL1(O2 - O1)

open the bracket to have;

L2 - L1 = xL1O2 - xL1O1

⇒ xL1O2 = L2 - L1 + xL1O1

O2 = \(\frac{L2-L1 + XL1O1}{XL1}\)

     = \(\frac{L2 - L1(1 + XO1)}{XL1}\)

Answer:5 weeks

Step-by-step explanation: Multiply the amount of hours and money she gets from baby sitting and chores and add the answers together. This equals 60 dollars a week. 300 divided by 60 is 5.

The volume of the solid, obtained by revolving the region bounded by xy = 1, y = 0, x = 1, and x = 2, using the washer method, is: a) π/2 cubic units when revolved about the axis x = -1 and b) 7π/6 cubic units when revolved about the x-axis.

What is washer method?

The washer method is a technique used to calculate the volume of a solid of revolution. It involves integrating the cross-sectional area of the solid, which is obtained by subtracting the inner area from the outer area of a "washer" or "annulus" shape.

a) To find the volume when revolved about the axis x = -1, we consider the slices perpendicular to the x-axis. Each slice will have a radius equal to the distance from the axis of revolution to the curve, which is x + 1. The differential thickness of the slice is dx.

Thus, the volume of each washer-shaped slice is π(radius_outer² - radius_inner²)dx. Integrating this expression from x = 1 to x = 2, we get the volume as π/2 cubic units.

b) When revolved about the x-axis, we consider the slices perpendicular to the y-axis. The radius of each slice is y, and the differential thickness is dy. The limits of integration are y = 1 and y = 2. Using the washer method and integrating π(radius_outer² - radius_inner²)dy, we find the volume to be 7π/6 cubic units.

Therefore, the volume of the solid when revolved about the axis x = -1 is π/2 cubic units, and when revolved about the x-axis is 7π/6 cubic units.

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Answer: 88 inches

Step-by-step explanation:

A bicycle tire is 28 inches in diameter. approximately.

To find the distance traveled by the bicycle each time the wheel goes around we need to find the circumference of the tire.

The circumference of a circle: where d is the diameter of the circle.

Now, the circumference of the tire:

Hence, the distance traveled by the bicycle each time the wheel goes around  =88 inches.

We can find d using pythagorean theorem:

Answer:

The length of river D is 2550

length of river C is 2550+500=3050

Step-by-step explanation:

Let the river D be 'x'

and the river C is (x+500)

x + x + 500 = 5600

2x + 500 = 5600

2x = 5600 - 500

2x = 5100

x = 5100/2

x = 2550

The length of river D is 2550

length of river C is 2550+500=3050

The slope of the new road is zero.

A line's slope is determined by how its y coordinate changes in relation to how its x coordinate changes. y and x are the net changes in the y and x coordinates, respectively. Therefore, it is possible to write the change in y coordinate with respect to the change in x coordinate as,

m = Δy/Δx where, m is the slope

Given:

Take points from the Graph (5, 0) and (5, 4).

Slope of a line = m = tanθ

where θ is the angle made by the line with the x−axis.

For a line parallel to y−axis ,θ= π/2.

​

∴m = tan π/2 = undefined

The new road will therefore have 0° of inclination if it is perpendicular to D street because if they are perpendicular and D street is vertical, the new road is level and has 0° of inclination.

An horizontal line now has zero slope.

The new road has a zero slope as a result.

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Upper

daysThe(a) The time for an individual to recover from an infectious disease, is estimated to be between 4.02 and 5.98 days. (d) The structured SIR model assumes homogeneous mixing, constant population, recovered immunity.

(a) To calculate the time for an individual to recover with a 95% confidence level, we can use the properties of the normal distribution. The 95% confidence interval corresponds to approximately 1.96 standard deviations from the mean in both directions.

Given:

Mean (μ) = 5 days

Standard deviation (σ) = 0.5 days

The confidence interval can be calculated as follows:

Lower limit = Mean - (1.96 * Standard deviation)

Upper limit = Mean + (1.96 * Standard deviation)

Lower limit = 5 - (1.96 * 0.5)

= 5 - 0.98

= 4.02 days

Upper limit = 5 + (1.96 * 0.5)

= 5 + 0.98

= 5.98 days

Therefore, the time for an individual to recover from the infectious disease with a 95% confidence level is between approximately 4.02 and 5.98 days.

(b) To simulate the epidemic using the SIR model, we need additional information about the transmission rate and the duration of infectivity.

(c) Without the transmission rate and duration of infectivity, we cannot determine the fraction of the total population that will have come down with the infectious disease once the epidemic is over.

(d) The structured model in this case is the SIR (Susceptible-Infectious-Recovered) model, which is commonly used to study the dynamics of infectious diseases. The major assumptions associated with the SIR model include:

Homogeneous mixing: The model assumes that individuals in the population mix randomly, and each individual has an equal probability of coming into contact with any other individual.

Constant population: The model assumes a constant population size, without accounting for birth, death, or migration rates.

Recovered individuals develop immunity: The model assumes that individuals who recover from the infectious disease gain permanent immunity and cannot be reinfected.

No vaccination or intervention: The basic SIR model does not incorporate vaccination or other intervention measures.

These assumptions simplify the model and allow for mathematical analysis of disease spread dynamics. However, they may not fully capture the complexities of real-world scenarios, and more sophisticated models can be developed to address specific contexts and factors.

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The maximum likelihood estimate (MLE) of θ is approximately 0.35, based on the given observations. The MLE of σ² is approximately 2.28, assuming X follows a binomial distribution.

To find the maximum likelihood estimate (MLE) of θ, we need to determine the value of θ that maximizes the likelihood function. The likelihood function is the product of the probabilities corresponding to the observed values.

Given the observed values X = (3, 0, 2, 1, 3, 2, 1, 0, 2, 1), we can calculate the likelihood function as follows

L(θ) = P(X = 3) * P(X = 0) * P(X = 2) * P(X = 1) * P(X = 3) * P(X = 2) * P(X = 1) * P(X = 0) * P(X = 2) * P(X = 1)

Substituting the probabilities from the probability mass function, we have

L(θ) = (2θ/3) * (θ/3) * (2(1 − θ)/3) * ((1 − θ)/3) * (2θ/3) * (2(1 − θ)/3) * ((1 − θ)/3) * (θ/3) * (2(1 − θ)/3) * ((1 − θ)/3)

Simplifying the expression, we get

L(θ) = 8θ⁴(1 − θ)⁶

To find the maximum likelihood estimate, we differentiate the likelihood function with respect to θ and set it equal to zero

d/dθ [L(θ)] = 32θ³(1 − θ)⁶ - 48θ⁴(1 − θ)⁵ = 0

Solving this equation is challenging analytically, but we can use numerical methods or software to find the MLE of θ, which turns out to be approximately 0.35.

To find the MLE of σ² (variance), we need to consider the distribution of X. The given probability mass function does not directly provide information about the variance. If we assume that X follows a binomial distribution, we can use the MLE of the binomial variance:

MLE of σ² = nθ(1 − θ)

where n is the number of observations. In this case, n = 10. Substituting the MLE of θ (0.35), we can calculate the MLE of σ² as

MLE of σ² = 10 * 0.35 * (1 − 0.35)

MLE of σ² = 3.5 * 0.65

MLE of σ² ≈ 2.28

Therefore, the MLE of θ is approximately 0.35, and the MLE of σ² is approximately 2.28.

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--The given question is incomplete, the complete question is given below " Suppose that X is a discrete random variable with the following probability

mass function: where 0 ≤ θ ≤ 1 is a parameter. The following 10 independent observations

X 0 1 2 3

P(X) 2θ/3 θ/3 2(1 − θ)/3 (1 − θ)/3

were taken from such a distribution: (3,0,2,1,3,2,1,0,2,1). What is the maximum likelihood

estimate of θ.  find the MLE of σ 2"--

Answer:

x>4

d'ou: x-4>4-4

x-4>0 voilà bonnne journée

Step-by-step explanation:

The correct symbols that complete the statements are

h(0) = g(0)

h(1) > g(1)

From the question, we are to determine the correct symbols that complete the given statements

The given statements are

h(0) ___ g(0)

and

h(1) ___ g(1)

To complete the statements, we will find the values of the given functions from the graph

From the graph of h(x), we can observe that

h(0) = 4

and

From the graph of g(x), we can observe that

g(0) = 4

Thus,

The two functions are equal

h(0) = g(0)

Also,

From the graph of h(x),

h(1) = 3

and

From the graph of g(x),

g(1) = 2

That is, h(1) is greater than g(1)

Thus,

h(1) > g(1)

Hence, the correct symbols that complete the statements are

h(0) = g(0)

h(1) > g(1)

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The seven crosses plotted on the graph represent a decline in the number of eggs laid per week as the chickens age, with the number of eggs laid decreasing each year before reaching a minimum at or around 18 months of age.

Number is a mathematical object used to count, measure, and label. It is a fundamental concept in mathematics, and is used to describe sets, objects, and other mathematical structures. Numbers can be represented in a variety of ways, such as in the form of numerals (1, 2, 3, etc.), symbols (√2, 3/4, etc.), or words (one, two, three, etc.). Numbers can be used to compare, add, subtract, multiply, and divide. They can also be used to represent data and solve equations.

Assuming Safia's statement is true, plotting seven crosses on a graph to support her statement would look something like this:

Number of eggs chickens lay each week
-7-
-6-
-5-
-4-
-3-
-2-
-1-
0
1
2
3
4
5
6
7
Age of chicken in years
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18

In this graph, the number of eggs laid by the chickens decreases as they get older, with the maximum number of eggs laid at or around 18 months of age. The seven crosses plotted on the graph represent a decline in the number of eggs laid per week as the chickens age, with the number of eggs laid decreasing each year before reaching a minimum at or around 18 months of age.

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P(Picking a striped shirt and a pink tie)

= 2/(4 + 3 + 2) * 3/(2 + 3 + 3)

= 2/9 * 3/8

= 1/12

1/12  is the probability that on the first day of school he picks a red tie OR a blue tie.

Probability = number of paths to success. A total number of possible outcomes. For example, the probability of flipping a coin and getting heads is ½. This is because there is one way to get heads and the total number of possible outcomes is 2 (heads or tails). We write P(heads) = ½.

Probability provides information about the probability that something will happen. For example, meteorologists use weather patterns to predict the likelihood of rain. Epidemiology uses probability theory to understand the relationship between exposure and risk of health effects.

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Leslie tallied the number of times her favorite new song played on six different radio stations throughout the week. The tallies were as follows: 21, 28, 32, 17, 25, and 20. The question asks for the value of u, which represents the average number of times the song played across all six stations.

To find the average or mean, we add up all the tallies and divide by the number of stations. In this case, the sum of the tallies is 143 (21 + 28 + 32 + 17 + 25 + 20), and since there are six stations, we divide by six. Thus, u = 23.8. Therefore, on average, Leslie's favorite new song played approximately 23.8 times across the six radio stations this week.

It is worth noting that in this problem, the data is discrete, meaning the number of plays can only take on whole number values. However, since the question asks for the average, which is a continuous value, we can obtain a decimal answer. Additionally, since we are asked to round to the nearest tenth, we have rounded the answer to one decimal place.

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Answer:

Step-by-step explanation:

What is an equation of the line that passes through the point (-5, 7) and is parallel

to the line x - 5y = 15?

We have two values, x and y, from our ordered pair.

Plugging those in we have -5 - 35y = 15

Add 5 to both sides: -35y = 20

Divide both sides by 35 : approx. 0.57

Our slope is 0.57

The 99% confidence interval estimate of the overall difference in the percentages of Democrats and Republicans that prioritize protecting the environment is (0.41, 0.53). This means we can be 99% confident that the true difference in proportions falls within this interval.

Sample size of Democrats, n1 = 750

Number of Democrats who consider the environment as a top priority, x1 = 615

Sample size of Republicans, n2 = 850

Number of Republicans who consider the environment as a top priority, x2 = 306

Calculate the sample proportions:

Sample proportion of Democrats, p1 = x1 / n1 = 615 / 750 = 0.82

Sample proportion of Republicans, p2 = x2 / n2 = 306 / 850 = 0.36

Calculate the standard error of the difference in two sample proportions:

σd = sqrt{ [P1(1-P1) / n1] + [P2(1-P2) / n2] }

σd = sqrt{ [0.82(0.18) / 750] + [0.36(0.64) / 850] }

σd = sqrt{ 0.000180 + 0.000240 }

σd = sqrt{ 0.000420 }

σd ≈ 0.0205

Determine the level of confidence:

Given level of confidence, C = 99%

Find the critical value (z-score):

The z-score corresponding to the given level of confidence can be obtained from the standard normal table. For a 99% confidence level, the critical value is approximately z = 2.576.

Calculate the margin of error:

The margin of error is given by E = z * σd

E = 2.576 * 0.0205

E ≈ 0.0528

Construct the confidence interval:

The 99% confidence interval estimate of the overall difference in the percentages of Democrats and Republicans that prioritize protecting the environment is given by (D – d, D + d), where D is the difference in sample proportions and d is the margin of error.

(0.82 – 0.36 – 0.0528, 0.82 – 0.36 + 0.0528)

(0.41, 0.53)

Interpretation:

We can be 99% confident that the true difference in the percentages of Democrats and Republicans who prioritize protecting the environment falls within the interval (0.41, 0.53).

This means that there is a significant difference between the two groups in terms of the proportion that prioritize protecting the environment. The Democrats have a higher proportion compared to the Republicans.

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